Now, the phone will not enter the USB debugging mode. I have the choice of "use as media" and "use as camera.
Phone is Verizon Galaxy Note 2 (SCH-I605V) now running on the T-Mobile network. The "use mobile network for data" is on, but the antenna isn't coming on.
SuperSU is installed, but gives the "if you updated to Android 4.3, you must re-root the phone." I have rooted phones before, but . . .
Everything I find is about putting in in USB debugging mode and using ADB.
ADN does not find the device installed. . . using the Samsung USB driver, downloaded from Samsung.
There is no USB debugging mode. Help!